package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.conditions.query.LambdaQueryChainWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
   @Autowired
   private UserService userService;
   @Autowired
   private ShoppingCartService shoppingCartService;
   @Autowired
   private AddressBookService addressBookService;
   @Autowired
   private OrderDetailService orderDetailService;

    /**
     * 用户下单
     * @param orders
     */
    @Override
    public void submit(Orders orders) {
//        获取用户id
        Long currendId = BaseContext.getCurrendId();
//       查询当前用户购物数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,currendId);
        List<ShoppingCart> list = shoppingCartService.list(wrapper);
        if(list==null||list.size()==0){
            throw new CustomException("购物车为空，不能下单");
        }
//查询用户数据
        User byId = userService.getById(currendId);
//        查询用户地址
        Long addressBookId = orders.getAddressBookId();
        AddressBook byId1 = addressBookService.getById(addressBookId);
        if(byId1==null){
            throw new CustomException("用户地址有误");
        }
        long id = IdWorker.getId();//订单号
        AtomicInteger atomicInteger = new AtomicInteger(0);
//        组装订单信息
        List<OrderDetail> orderDetails  = list.stream().map((item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(id);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            atomicInteger.addAndGet(item.getAmount().multiply((new BigDecimal(item.getNumber()))).intValue());
            return orderDetail;
        })).collect(Collectors.toList());
//组装订单数据
        orders.setId(id);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(atomicInteger.get()));//金额
        orders.setUserId(currendId);
        orders.setNumber(String.valueOf(id));
        orders.setUserName(byId.getName());
        orders.setConsignee(byId1.getConsignee());
        orders.setPhone(byId1.getPhone());
        orders.setAddress((byId1.getProvinceName()==null?"":byId1.getProvinceName())
        +(byId1.getCityName()==null?"":byId1.getCityName())
        +(byId1.getDistrictName()==null?"":byId1.getDistrictName())
                +(byId1.getDetail()==null?"":byId1.getDetail())
        );
//        向订单插数据
        this.save(orders);
//        向订单插多条数据
        orderDetailService.saveBatch(orderDetails);
//        清空购物车
        shoppingCartService.remove(wrapper);


    }
}
